Fix scaling post-shaders on OpenGL. See #9742

GPU/Common/FramebufferCommon.cpp

@@ -1022,6 +1022,7 @@ void FramebufferManagerCommon::CopyDisplayToOutput() {
 			}*/
 		} else {
 			draw_->BindFramebufferAsRenderTarget(nullptr, { Draw::RPAction::CLEAR, Draw::RPAction::CLEAR });
+			draw_->BindFramebufferAsTexture(vfb->fbo, 0, Draw::FB_COLOR_BIT, 0);
 			draw_->SetScissorRect(0, 0, pixelWidth_, pixelHeight_);
 			// We are doing the DrawActiveTexture call directly to the backbuffer here. Hence, we must
 			// flip V.

GPU/Vulkan/FramebufferVulkan.cpp

@@ -197,10 +197,6 @@ void FramebufferManagerVulkan::NotifyClear(bool clearColor, bool clearAlpha, boo
 	//}
 }
 
-void FramebufferManagerVulkan::DoNotifyDraw() {
-
-}
-
 void FramebufferManagerVulkan::UpdatePostShaderUniforms(int bufferWidth, int bufferHeight, int renderWidth, int renderHeight) {
 	float u_delta = 1.0f / renderWidth;
 	float v_delta = 1.0f / renderHeight;

GPU/Vulkan/FramebufferVulkan.h

@@ -106,17 +106,9 @@ public:
 	virtual void RebindFramebuffer() override;
 	VkImageView BindFramebufferAsColorTexture(int stage, VirtualFramebuffer *framebuffer, int flags);
 
-	// VulkanFBO *GetTempFBO(u16 w, u16 h, VulkanFBOColorDepth depth = VK_FBO_8888);
-
-	// Pass management
-	// void BeginPassClear()
-
 	// If within a render pass, this will just issue a regular clear. If beginning a new render pass,
 	// do that.
 	void NotifyClear(bool clearColor, bool clearAlpha, bool clearDepth, uint32_t color, float depth);
-	void NotifyDraw() {
-		DoNotifyDraw();
-	}
 
 protected:
 	void Bind2DShader() override;